private void btnUpdate_Click(object sender, EventArgs e)
{
if (dataGood())
{
int acct = Convert.ToInt32(txtAccountNum.Text);
string fn = txtFirstName.Text;
string ln = txtLastName.Text;
string sbal = txtAccountBalance.Text;
if (sbal[0] == '$')
{
sbal = sbal.Remove(0, 1);
}
else if (sbal[0] == '-' && sbal[1] == '$')
{
sbal = sbal.Remove(1, 1);
}
double bal = Convert.ToDouble(sbal);
AccountRecordRA ra = new AccountRecordRA(acct, fn, ln, bal);
try
{
file.Seek(ra.FileIndex, SeekOrigin.Begin);
ra.write(file);
readFile();
}
catch (IOException io)
{
MessageBox.Show(io.Message, "Error updating record");
}
setControlState("i");
}
}
private void btnInsert_Click(object sender, EventArgs e)
{
if (btnInsert.Text == "Cancel")
{
setControlState("i");
return;
}
if (dataGood())
{
int accountNumber = Convert.ToInt32(txtAccountNum.Text);
if (isValidAccount(accountNumber))
{
string firstName = txtFirstName.Text;
string lastName = txtLastName.Text;
double balance = Convert.ToDouble(txtAccountBalance.Text);
AccountRecordRA ra = new AccountRecordRA(accountNumber, firstName, lastName, balance);
try
{
//position file pointer
file.Seek(ra.FileIndex, SeekOrigin.Begin);
ra.write(file);
readFile();
clearText();
}
catch (IOException io)
{
MessageBox.Show(io.Message, "Error writing to File");
}
}
}
}
private void readFile()
{
//listbxClients.Items.Clear();
myTable.Rows.Clear();
AccountRecordRA ra = new AccountRecordRA();
try
{
file.Seek(0, SeekOrigin.Begin);
for (int i = 0; i < MAX_RECORDS; i++)
{
ra.read(file);
if (ra.AccountNumber > 0)
{
//listbxClients.Items.Add(formatRecordToString(ra));
myTable.Rows.Add(formatRecordToDataRow(ra));
}
}
dg1.ClearSelection();
}
catch (IOException io)
{
MessageBox.Show(io.Message, "Error reading from File");
}
}
private DataRow formatRecordToDataRow(AccountRecordRA ra)
{
DataRow row = myTable.NewRow();
row["AccountNumber"] = ra.AccountNumber;
row["FirstName"] = ra.FirstName;
row["LastName"] = ra.LastName;
row["Balance"] = ra.AccountBalance.ToString("c");
return(row);
}
private string formatRecordToString(AccountRecordRA ra)
{
StringBuilder sb = new StringBuilder();
sb.Append(ra.AccountNumber);
sb.Append("|");
sb.Append(ra.FirstName);
sb.Append("|");
sb.Append(ra.LastName);
sb.Append("|");
sb.Append(ra.AccountBalance.ToString("c"));
return(sb.ToString());
}
private void btnDelete_Click(object sender, EventArgs e)
{
if (MessageBox.Show("Are you sure you want to delete this record?", "Record Delete",
MessageBoxButtons.YesNo, MessageBoxIcon.Warning,
MessageBoxDefaultButton.Button2) ==
System.Windows.Forms.DialogResult.Yes)
{
AccountRecordRA ra = new AccountRecordRA();
ra.AccountNumber = Convert.ToInt32(txtAccountNum.Text);
try
{
file.Seek(ra.FileIndex, SeekOrigin.Begin);
ra.delete(file);
readFile();
}
catch (IOException io)
{
MessageBox.Show(io.Message, "Error deleting record");
}
setControlState("i");
}
}
private void initData()
{
AccountRecordRA ra = new AccountRecordRA();
try
{
//clear the file incase it contains corrupt data
file.SetLength(0);
//position file pointer:
file.Seek(0, SeekOrigin.Begin);
for (int i = 0; i < MAX_RECORDS; i++)
{
ra.write(file);
}
readFile();
MessageBox.Show("Data file has been initialized");
}
catch (IOException io)
{
MessageBox.Show(io.Message, "Error initializing File");
}
}
